Pneumatic hydraulic air bag system, fits Charger from 2015 to 2023. I don't know if it fits the previous model. The sale includes front shocks and a gauge showing the air pressure in each bag. I used it minimally, maybe 3 to 6 months. I paid over 8,000 for it, as I recall, and I'm asking 6,500, negotiable within reason, God willing. Serious buyers can contact via WhatsApp or private message. May God grant us and you all the best.